Draft-rigging for railway-cars.



. section:

UNITED STATES PATENT OFFICE.-

GEORGE A. JOHNSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. MINER,or CHICAGO, ILLINOIS.

DRAFT-RIGGING FOR RAILWAY-CARS.

Specification of Letters Patent.

Patented Feb. 16, 1915.

Original application filed May 21, 1913, Serial No. 768,986. Divided andthis application filed September 9, 1913. Serial No. 788,831.

- of Illinois, have invented certain new and.

Railway-Cars, ofiwhich the following is a full, clear, concise, andexact description, reference being had to the accompanying drawings,forming a part of this specification.

My invention relates to improvements in draft rigging for railway cars,and this application constitutes a division of my copendin applicationSerial Number 768,986 filed ll ay 21st, 1913, for improvements in draftrigging for railway cars.

I The object of my invention is to provide a draft rigging of durableconstruction and eflicient operation.

In thedrawings forming a part of this specificatiomFigure l is a sideelevation partly in vertical longitudinal section of a draft riggingembodying my invention. Fig. 2 is a plan view partly in horizontaluseful Improvements in DraftRigging for Referring to the drawings 3, 3illustrates draft sills or members of the car frame to which the draftrigging is applied, 4 the end sill, 5 the buffer block, 6 the draw-barcarry iron, 7 the draw-bar, 8 the yoke secured thereto, 9 the draft earwithin the yoke, 10, 10 the rear stop members, 11 the tie plate, all ofwhich parts are'of known construction.

The draft gear 9 comprises a shell 12, springs, 13, and frictionmechanism 14 within the shell. The springs are preferably two in number,consisting of an outer spring 15 and an inner spring 16 nestedtherein,both of these springs being rearwardly seated against the friction shelland forwardly seated against the friction shoes 17.

The friction mechanism 14 comprises the friction shoes 17, which arepreferably three in number, a wedge 18 provided with wedging faces 19corresponding in number with the'friction shoes. and an anti-frictionroller 20 seated .between each wedging face 19 of the wedge and theadjacent friction shoe 17. The wedge 18 is provided with an internalrecess 21 to receive the head 22 of the connecting rod 23 which passesthrough said wedge and through the rear end of the shell, where it issecured by a nut 24, which is received within the recess 25 in theexternal rear face of the shell. I

The front stop me'mbers'26, 26 are pro- .vided with the front stopshoulders 27 27,

against which the front follower 28 isadapte to engage on forwardmovement of the draw bar. The front follower 28 engages the front face,29 of the wedge 18, said wedge 18 passing through the opening 30provided in the intermediate follower 31, the follower 31 beingstationary. between the front stop members and being received within theslots 32, 32 oppositely arranged Iion the inner faces of the front stopmemers.

The front ends 33 of the friction shoes are adapted to engage the rearface 34 of the intermediate follower. It will be obvious that theintermediatefollower is stationary both in forward and rearward movementof the draw bar. on forward movement of the 'draw bar the shell is drawnforwardly by means of the draft yoke, the friction shoes engage againstthe rear face of the stationary intermediate follower, the springswithin the shell being seated against the friction shoes are compressedbetween said shoes and the shell. The wedge is stopped against the rearface 28 of the front follower 28. The wedge and friction shoes, however,are not subjected to movement and merely serve as a stop for thesprings, the springs only being in compression resisting action onforward movement of the draw bar. On rearward movement of the draw barthe shell is stationary against the rear stop members. The wedge isforced by the front follower rearwardly, spreading the friction shoesand forcing the same rearwai-dly, the springs, meanwhile, beingcompressed within the shell until on full compression of theparts thefront follower engages the shoulders 35, 35, with which the front stopmembers are provided, limiting the rearward movement of the frontfollowers and thus limit ing the compression of the parts within theshell and the travel of the draw bar. Thus it will be observed onforward movement of the draw bar the parts under compression within theshell are stagned by both the front and intermediate icllowers, by

combination, adraw'bar, stop members, a

stationary intermediate follower and mov- -'-able front follower, ashell, friction shoes and wedge within the shell, the stationaryfollower having an opening therethrough for the passage of the wedge,the wedge being in engagement with the movable follower.

2. In a draft ri ging for railway cars, stop members and ollowers incombination with a shell, 1 springs, friction shoes and wedge withintheshell, one of said followers being stationary and engaging the shoes onforward movement of the shell, another of said followers bein movableand in engagement with the we ge.

3. In a draft rigging for railway cars, the combination with a draw bar,of a movable end follower, a stationary intermediate-follower, afriction shell, friction shoes cooperative with-said shell, a mainspring, said shell, shoes and spring being located on the opposite sideof the stationary follower to that on which the movable follower islodated, a wedge cooperative 'with said shoes, and means for moving thewedge only upon movement of the movable follower.

GEORGE A. JOHNSON. Witnesses: i I

ELIZABETH Bnrr'r, JOHN A. MAn'rINKUs.

